old buicks Posted July 18, 2016 Share Posted July 18, 2016 I have a Carter BB 1 model #245SA that I have on a 1910 Buick model F. Carb was cleaned in cleaner after complete disassembled, then reassembled and new gasket. Problem is, when going down the road it pops every so often like it isn't burning the gas in the cylinder. I've adjusted the main needle down to almost a kill and then back up to too much fuel. Tried to settle somewhere in the middle but it still pops. What do I do next? Link to comment Share on other sites More sharing options...
carbking Posted July 18, 2016 Share Posted July 18, 2016 If it is popping through the carburetor, then adjust either the spark or the valves or both. If it is popping through the exhaust, more testing might be necessary. Jon. Link to comment Share on other sites More sharing options...
Mark Shaw Posted July 19, 2016 Share Posted July 19, 2016 (edited) Old Buicks, I have the same carb on my Model F Buick. A good mechanic friend kneeled on the running board and adjusted my carb while I drove uphill on our first one & two cylinder tour last weekend. It took some tinkering under load to get it pulling better. You might also check the lowest point on the intake manifold to make sure the 1/16 drain hole is not plugged. Many don't know about that important hole that drains excess fuel. Carter BB1 Carburetor Instructions and Parts List.pdf Edited July 19, 2016 by Mark Shaw (see edit history) Link to comment Share on other sites More sharing options...
robert b Posted July 19, 2016 Share Posted July 19, 2016 Check your float level , on these carbs to low a float level will give lean running at all speeds, level is 1/16 to 1/32 below the machined surface of the lower body to the cylinder body of the float with the needle closed. Turn the lower body up side down an place a straight edge across the machined edge to get a good reading. bob Link to comment Share on other sites More sharing options...
old buicks Posted July 19, 2016 Author Share Posted July 19, 2016 Mark, the intake V hole is open because it drips fuel from there when I shut off the engine. I will try to get my wife to ride the running board and adjust the fuel while I drive it today. Robert, that is a good idea because I noticed that someone added a bit of solder to the float when I had it apart. I filed down the most of it but a little solder could certainly throw the float way out of adjustment. Will keep everyone posted. Thanks for the ideas. Link to comment Share on other sites More sharing options...
carbking Posted July 19, 2016 Share Posted July 19, 2016 Extra solder on the float would cause the float to ride lower in the fuel bowl, thus causing a richer condition. Jon. Link to comment Share on other sites More sharing options...
robert b Posted July 19, 2016 Share Posted July 19, 2016 Yes John I was thinking up side down again bob Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now